I remember your old sheet! This is a nice update... I think I'm going to need to update the Zelda Items sheet of mine with this new sprite information, if you don't mind...
Sure thing Miles
Well I found a beta sprite sheet:
This file is repeated many times. It has a lot of repeated graphics and beta graphics (Niko, rock's feather hub icon, a bomb, stamp frame).
Note that Niko's colors are not the right ones.
Finally there are unused graphics:
Here we have (from left to right) Gonzo, a big stamp, a bouncy thing you can find in ALTTP, a big hand. It's nice to see a Gonzo sprite, since he doesn't appear in the GBA, he just announces things on the TV screen, so it seems he was supposed to appear as a sprite.
In fact I believe the final bomb sprites are also unused, since inside the game files there are graphics that include the bomb sprite, a sword and a bow.
So, maybe, you could be able to use a bow and a sword, which would have made the whole game feel a little more Zelda-ish.